Cross-rail clamp for open-side planers



Feb. 19, 1929. 1,702,471

E. L. FICKETT E AL caoss RAIL CLAMP FOR OPEN sum PLANERS Filed Sept. 29, 1927 4 t 1 4 Sheets-Sheet 2 emfi. I221 e z&

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Filed Sept. 29, 1927 Feb. 19, 1929;

E L FICKETT AL cnoss RAIL CLAMP FOR OPEN SIDE PLANERS Feb. 19, 1.929. v 1,702,471

E. L. FICKETT ET AL CROSS RAIL CLAMP FOR OPEN SIDE PLANERS Filed Sept. 29, 1927 4 Sheets-Sheet 3 4 Sheets-Sheet 4 E L FICKETT ETAL CROSS RAIL CLAMP FOR OPEN SIDE PLANERS Filed Sept. 29, 1927 Feb. 19, 1929.

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Patented Feb. 19, 1929.

ERNEST L. FICKETT AND PHILIP E. ARTHUR, 0F ESIGNORS, BY MESITE ASSIGNMENTS, TO

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LE'A'NY, INCL, A CORPORATJCO'N OF DELAWARE.

CROSS-RAIL CLAMP FOE OPEN-SIDE Application filed september 29, 192?. No. 222,904.

The principal object of this invention is to provide a clamping device for clamping the cross-rail to the vertical ways of the column or upright of an open-side planer, and at the same time, and by a single manipulation, to operate a brace clamp on the rear of the said column or upright. The invention also involves features of construction by which very strong and effective clamp ng action can be secured, as is necessary for a construction of this kind in which the cross-rail overhangs. Other objects and advantages of the invention will appear hereinafter.

Reference is to be had to the accompanying drawings, in which Fig. 1 is an end view of an open-side planer, showing the position and application of the features of this invention thereto,

Fig. 2 is a side view;

Fig. 3 is a plan of the clamping mechanism with the covering casing shown in section;

Fig. 4 is a side elevation of the same;

Figs. 5,6 and 7 are enlarged detail views showing details of the parts in clamped and, unelamped condition; and

Fig. 8 is a plan of the brace and column. or upright, showing the clamping means for that part of the cross-rail.

The invention is shown as applied to an open-side planer having a bed 10 and a slidable table 11 as usual. The bed is provided with an upright or column 12 which has vertical ways 13 thereon for supporting the cross rail 14. The cross rail of course overhangs in this type of planer and for that reason it is necessary to have a powerful clamping means on the vertical ways. Furthermore, the bracket 15 of the cross rail extends backwardly along the column to its rear side and is adapted to be secured to the column at that point by the means shown in Fig. 8. The other features of the actual machine shown in Figs. 1 and 2 are of the usual construction and will not be described in detail.

In these figures there is a plate 17 which covers the mechanism shown in Figs. 3 and 4. Behind this plate extends a shaft 20 having a square end by which it can be turned and a bearing 21 extending outwardly. This shaft is provided with two screws 22 and 23 arranged right and left handed. The screw 22 is provided with sliding nut 2 f having a stud 25 projecting from it. This stud projects into a longitudinal slot 26 in a link 27 limit about a half circle and of full ianieters at right angles to each other. d position is a lug 3O onthe rail which, of con; moves up and down with it but is rigid vith respect thereto. The clamping is done by a gib 31 movable up and down with the cross rail and fitting the angle of the vertical ways 13. The two parts 30 and 31 are provided with concave surfaces normally engagir the larger side of the cam 28.

In the posi thelink 27 has been swung to the right by the stud 25 on the sliding nut 24, the large side of the cam is seated in the concave surface in the lug 30, and the smaller side part of the cam isseated in the concave surface of the gib 31. This leaves the gib loose and affords no clamping action.

Now when the screw 22 is turned to bring the pin 25 back to the position shown in Fig. 3, the cam. 28 will have turned to the position shown in Fig. 6, in which its full diametered part is entering the concave surface in the gib 31 and starting to bind. Now the further turn of the screw 22 will bring the link 2? around to the position shown in Fig. 7 or nearly thereto. In this position the gib is clamped to the limit, as the large diametered part of the cam extends about horizontally hot veen the two c ncave surfaces and forr=os the gib as far to 'tl'io left as is pos ble to do with this mechanism. Of course it is understood that it is not always moved to its absolute limiting position, depending upon the wear, etc. In this position the gib 31 is forced up against the vertical way which is then clamped between said gib and an opposite projection 33 on the rail shown in Figs. 3 and 8.

In the turning of the shaft 20 for the purpose of securely clamping the gib 31 to the way 13, of course, the screw 23 is turned also. This also has a nut 34 with a stud 35. This stud is located in a slot 36 in a hell-crank 37 pivoted on the rail. The turning of this screw, therefore, swings said hell-crank, which is connected by a link 38 to an arm 39 on a shaft 40. This shaft extends rearwardly along the inner side of the vertical column 12 and by turning it in the direction above in- 'oughout the rest of it, or of two undicated it screws into a brace clamp ll and ti htens it upon a vertical ray on the rear inner face of the column along which the brace 15 of the cross rail slides, and thereby clamps said way between the ciani anc a lug i3 on the brace at the same time that the gib 31 is clamped by the same shaft 20 to the front ways 13.

In this way it will be seen that a powerful clamping action is secured on the front w; and that, exactly siinultancously tnercwit the brace on the back of the cross head if? also firmly clamped by the brace clamp at as has just been described. These tw clamps wort:

together by the same mechanism and the rcof the invention, we are aware of ti changes can be made therein by a skilled in the art without departing ti, scope of the invention as expressed in the claims.

Therefore we do not wish to be limited to the exact form shown, but what we do claim is 1. In a cross rail clamp for an open-side planer, the combination with vertical ways on which the cross rail moves up and down, of a gib for engaging the ways, and a lug on the cross head opposite the gib, said gib and lug having opposed COP-.CZ'LVO surfaces, a cam lot-at ed between said surfaces and having substantially half of its circun'rfcrcnce ttarther from its axis than the other half, whereby when said cam is turned to a position in which the portion. of larger diameter extends transversely between said surfaces, the gib will be forced into position to clamp the cross rail on said ways, and manual means to turn said cam.

2. In a clamping device for the cross rail oi an open-side planer, the combination with an upright having vertical ways on the trout and vertical ways on the side at the roar, of a cross rail movable along the front ways and having a brace extending backward along the column tor engaging the rear ways, a gib carmod by the cross rail for clan'iping it to the front ways, a rotatable cam for actuating said 'gib, a member for clamping the brace to the M way, a it may, lever secured to said cam and having a pin-a connection with one oil said mas, a cha gaging the side way, a screw running rearwardly from the rail and opcratively conl'iected with said ciainp, a bell-crnnk lever having a pinand-slot connection with the other of said nuts, and connections from said bellcrank to said screw.

4:- 111 an opeirsidc planer, the combi attion with the upright column, provided with front m and side ways, and the cross-rail slidab'ly engaging said ways, of means to clamp said rail on said ways, comprising a gib engaging one side of the front way, a cinailar cam, having half its circumference on a longer radius than so the other half, operatiycly engaging said gib,

clamp engaging one side or saidside way,

a screw operatively engaging said clamp, a shaft having two screw-threaded portions, carried by the cross-rail, a nut on each of said portions, connections from one of said nuts to said cam, and connections from the other nut to said screw, whereby rotation of said shaft in one direction will bind said gib and said clamp to said ways to rigidly hold the cross-rail in adjusted position.

In testimony whereof we have hereunto at fixed our signatures.

ERNEST L. l ICKlGlJi. PHILIP E. ARTHUR. 

